What's the best way to show an animation from after effects on a website onload?
It needs to play like a load screen in all major browsers and iOS devices.
What's the best way to show this?
I tried html5 and the auto play didn't work on iPad. I don't want to use flash. The animation is too complex for just JavaScript. Is it worth trying to make a high quality animated GIF?
Well, your main problem with virtually any onload video is going to be load and buffer time, especially on a mobile device. If the splash screen takes half a minute to load, the experience will be very subpar, and there's virtually nothing you can really do to reduce that load time short of making the video low quality (a large animated gif will have the same problem).
My recommendation would be to try coding the animation using pure HTML5 animation effects if possible. They will render faster, use only static images, javascript and CSS, and will be more widely compatible with modern desktop and mobile browsers.
Unfortunately, it is not possible to auto-play html5 video on an iOS device. At least as of iOS 5, Apple has disabled both auto-play and pre-loading, presumably to save bandwidth for users who may be on limited or expensive mobile data plans.
Unless you're willing to skip the video, the only workaround is to get the visitor to click or touch something on the page. Mobile Safari will allow you to play a video using Javascript methods (as opposed to the native player controls), but the first call to .play() has to come from a "click" or "touch" event handler.
You can limit this requirement to iPads and still allow desktop browsers to auto-play, but there doesn't appear to be any kind of reliable feature-detection method, so you have to parse the User Agent string (navigator.userAgent).
There isn't much documentation on the strange, non-standard things Mobile Safari does with video, but this article has some very good, detailed information and some code samples:
http://blog.millermedeiros.com/html5-video-issues-on-the-ipad-and-how-to-solve-them/
Edit: And then there's this elaborate and absurd workaround that Apple uses on its own site.
https://docs.google.com/document/pub?id=1GWTMLjqQsQS45FWwqNG9ztQTdGF48hQYpjQHR_d1WsI
Related
I'm currently working on something that uses a livestream from Ustream as a fixed background. At the moment, it only works on desktop, and I personally think that it wouldn't be the best idea to do this for mobile because of performance and so on (not to mention, I would hate for my mobile data to be chowed down by a video I cannot control). I'm simply curious if it is possible at the moment.
I tried it, just for fun, but realized that it doesn't autoplay and if I do initiate it by hitting play, a media player opens up with the stream in it - at least on iOS.
Just got me wondering if this was possible. I mean, facebook and instagram do it without opening up a media player, so I'm sure it is, but I'm assuming it's not as straightforward as I would want it to be.
Curious to hear your thoughts!
It is possible, but I guess more likely it depends on the device and the browser what it using, I tried now with this url: https://www.nationalgeographic.com/magazine/2017/09/holland-agriculture-sustainable-farming/ on my S9+ with the Samsung browser and it works for me if I ask the desktop version of the website. However I suggest to forget the background videos or the users will hate you when your app/site will consume all of their mobile data. And I don't want to mention the lower end devices. Those may not support or if support it will have a bad experience to view a background video.
For background video: https://www.w3schools.com/howto/howto_css_fullscreen_video.asp
Normally a real stream doesn't have too much difference compared to a static video if we just strictly viewing the background video/stream part.
It is possible, there is a good article on it here.
As the article describes...
By default, it can only autoplay when the video is muted. But for
webkit/iOs you also need a second attribute; playsinline. This
attribute makes it so that it, well, plays inline (and doesn’t
automatically jump to fullscreen video)
More information from google and webkit
I have a <video> element at the top of my page playing an animation in the background (very similar to the one found on the Google Hangouts page). On most computers, the video plays smoothly and it seems fine, but on older hardware there is a lot of lag and the browser slows down quite a lot.
Is there anyway to detect the performance of the video playback? I'd like to either replace the video with a static image or pause the video if performance is an issue.
Use the video metrics if available in your browser. Here's an example using webkit prefixed DroppedFrameCount.
http://git.chromium.org/gitweb/?p=chromium.git;a=blob;f=chrome/test/data/media/html/media_stat_perf.html
See also: http://wiki.whatwg.org/wiki/Video_Metrics for the Moz prefix.
You could use Get the timestamp of loaded page to determine how fast the user loads the page, then if their bandwidth is below a specified threshold, supply an image rather than the variable.
I was wondering if html5 is supporting touch functionality on a mobile device native? So we don't have to make an native app for iOS/Android/WP7 but can make an html5 page which loads in the mobile browser.
EDIT
I mean the JavaScript support for touch native in the browser so you can do you own thing with the touch in html5.
Depends on the type of touch event. For your standard browser click/mouse events these are emulated by the browser. As mentioned by Halst, just make your clickable elements big enough to work in a mobile environment.
If you want to use multitouch/gestures, it gets a little more interesting.
Webkit provides touchstart, touchmove, touchend, touchcancel. For single touch events support should be the same in both IOS Safari and Android Webkit. You could roll your own or use a library like jqTouch.
You can read more on how IOS Safari handles touch events. Events for Android don't seem to be as well documented, but you can read more on quirksmode touch support.
Just make liks and buttons big enough, and that's it.
Somewhat.
It's possible to write a webpage that looks almost as a native app for iPad (including multi-touch) but I had to give up with using "high level" events and had to handle instead the touches array explicitly to get a reasonable zoom/pan. The results are IMO quite good (people I've shown that vector graphics editor toy thought it was a native app).
For Android however things are a little trickier because on my Nexus one apparently there is no way to get anything close to full-screen (and for a phone losing the address bar space means losing a LOT of space) and also multitouch is disabled in the default browser :-(
Both problems (fullscreen and multitouch) are however solved for example in Opera and this is in my opinion sad because (may be) this means they don't WANT good web apps on the phone...
So technically it's possible to write a single html5/js program that runs in both desktop and phone, but this doesn't of course mean that the best UI for a desktop app is also the best for a phone.
I am looking at developing web apps for mobile device specifically, the iPhone but this discussion is open to mobile devices in general. I was trying some HTML5 websites on both my desktop browser and iPhone browser.
An example is: www.creativepony.com
If I understand correctly, the grass animation was made using the canvas tag of HTML5 and then using javascript to create the animation. In my desktop browser, it looks fine and very smooth. However, when I visit the website in my iphone 4 browser (iOS 4.1), the grass animation lags.
I tested with 3G and wifi. They both lag but 3G is slightly worse.
My question is, if I were to develop animation rich HTML5 + JS web app, what would be causing the lag? Is it the iPhone CPU itself? or is it the mobile browser? or just a slower internet connection on the iPhone? or something else?
I am asking because it seems like the iPhone 4 CPU is powerful enough to run some very impressive games. How can it not be able to display a HTML5+JS animation? If it is slower internet connection, the offline caching ability of HTML5 should help especially since I want to make my web app offline-capable. Or, is it the safari browser on the iPhone? Or something else entirely.
Thanks again!
Mobile Safari simply isn't very good at running Javascript animation, due to the fact that it gets powered by the CPU. Even the simplest transforms and changes to opacity can be very sluggish.
However, CSS -webkit-transition and -webkit-animation rules can be used to good effect, as they are powered by the GPU: the results can appear as smooth as native iOS animations.
I'm not sure but I think javascript does not use GPU so a game on you iphone can run smooth because of the GPU but a javascript animation can't... anyway as I said I'm not sure but you can take a look at this http://ajaxian.com/archives/javascript-running-on-the-gpu
Regards
I have an html5 video app which consists of video + JS swipable playlist + other JS animated overlays.
In iOS, onload performance of the playlist swiping and overlay animation is fine. Once a video has played, even if it is stopped, the playlist swiping and overlay animation is very very slow. Some users think it is not responding at all.
In Chrome/desktop, everything is fine.
If I log status information, the logs look the same regardless of whether a video has played or not. I don't know where to begin to debug. It seems to be a memory issue (?), but not sure how or if it can be addressed.
Anyone have any thoughts?
Javascript in iOS (both safari and UIWebView) execution can be stopped (or killed could be more appropriate term) without throwing any errors if under heavy CPU load to save more power for background native tasks or special tasks like handling video - rendering video even if hardware (GPU) supported still requires more CPU power thus it gets higher priority then javascript and can lead to the javascript acting not as intended or expected - it can work sluggish or not at all in extreme cases.
The only thing I can come with is pausing the video on any user input in iOS - maybe it would help.
regards,
Tom